Typewriting machine



G. A. SEIB TYPEWRITING MACHINE March 11 1924.`

Filed June 12 1922 Snom/tot WITNEEEEE Patented Mar.. 11, 1924.,

GEORGE A. sans, or ILIoN, New Yoan,

ASSKIGNOR T0 RETvIINGTON TYPEWRITER COM- PANY, OF ILION, NEW YORK, A CORYORATION OF NEW YORK.

TYPEWRITING MACHINE.

Application inea June 12, 1922. serial no. 567,564.

To all 'whom t may concern:

Be it known that l, GEORGE A. Sims, citizen of the United States, and resident of llion, in the county of Herkimer and State of New York, have invented certain newand useful Improvements in rTypewriting Machines, of which the following is a specification.

My present invention relates primarily to carriage feeding mechanism for typewriting and other` machines, and the general object of the invention is to provide improved mounting for certain elements of the carriage feeding or escapement mechanism. More specifically stated, the object of the invention is to provide a mounting for the escapement dog carrier or rocker which enables the dog carrier to yield or give as a whole during the escapement operation so as to absorb the shock due to the movement of parts and minimize the noise.'

To the above and other ends which will hereinafter appear, my present invention consists in the features of construction, combinations of devices and arrangements of part-s hereinafter described and particularly pointed ont in the claims.

In the accompanying drawings which illustrate the preferred form of the invention,

Figure 1 is a fragmentary rear elevation partly in section of the escapement mechanism of a Remington typewriting machine embodying my invention.

Figure 2 is a fragmentary, vertical sectional view taken on a plane indicated by the section line 1-1 in Fig. l and looking in the direction of the arrows at said line.

Figure 3 is a fragmentary horizontal sec tional view taken on planes indicated by the section line 2-2 in Fig. land looking downward.

Figure 4 is a perspective view on an enlarged scale of a novel part hereinafter referred to as a spring yoke.

In the Remington typewriting machine, as is well understood, the platen carriage, fragmentarily illustrated at 1, comprises front and rear grooved bars, only the rear bar 2 being shown' herein, the bars cio-operating through rollers 3 with fixed guide rails 4 mounted on the top plate 5 of the machine. The carriage is constantly urged toward the left bythe usual carriage motor or spring drum mechanism, not shown herein, with which the carriage is connected by a band or strap, left-ward movement being controlled by the carriage feeding or escapement devices which are operated from the printing keys so as to cause a letter space feeding movement of the carriage at each printing operation and also when the space bar is actuated. Arms 6 pivoted on the carriage carry a feed rack 7 which normally meshes with a feed pinion 8, said pinion being mounted at the forward end of a horizontal shaft 9 which bears in a fixed support or bracket 10. Mounted on the rear end of the shaft 9 is an escapement wheel 11 providedvwith'radial teeth 12. Cooperative with the escapement wheel are two escapement dogs 13 and 14 mounted on and projecting upward from a dog carrier or rocker comprising an upright portion 15 and a transverse lower portion 16. The dog 13 is spring pressed and is pivotally supported at 17 at the front side of the dog carrier and normally engages with the lowermost tooth 12 of the escapement wheel, a stop lug 13a which projects forward from the carrier limiting the feeding movement of the dog 13 and determining its normal position on the carrier. The dog 14 is adjustably secured to the rear side of the upright portion 15 of the carrier by screws 18 and is provided with a beveled contact surface 14a which co-operates with the escapement wheel when the carrier is rocked forward at printing operation. The rocking is effected by connections made with a type bar operated universal bar, said connections comprising a downward extension or arm 19 secured at its upper end by a screw 19x to the side of the dog rocker and provided about midway of its length with a headed adjusting screw 19a which is threaded into the rear face of the dog carrier. Surrounding the shank of said screw and confined between the face of the dog carrier vand the opposite' face of the arm 19 is a coiled spring 19brwhich assists in adjusting operations. The arm 19 carries a laterallyextending grooved pin 20 with which co-operates the slotted rear end of a connecting link or member 21 which is one of the elements in the train of connecting devices between theV dog carrier and' the, universal bar. Asupporting hanger or bracket 22 secured to and depending from the top plate is provided with rounded enlargements or lugs 23 which are perforatedY to receive supports or bearings for the dog rocker, one of the perforations being tapped and receiving a pivot screw 24, the inner end of which is coned or pointed, said screw being held when adjusteld in place by a check nut 25. The opening in the other lug 23 receives a pin 26 having its inner end coned or pointed, said pin be# ing secured in adjusted position by a set screw 27. The parts above described are found in the present Remington typewriting machine and in the main may be seen in my Patent 1,289,934, granted Dec. 31,1913. Therefore these lparts need not be herein referred to at greater length, no claim to them per se being made in the present application `Als heretofore made the dog rocker was adapted to receive at the ends of the part 16 the coned coaxial' supports 24, 26, said rocker or carrier bearing directly on said supports 24 and 26. By my present invention there is provided means lfor yieldingly mounting the dog carrier or rocker instead of as previously mounting it directly on the unyielding supports v24, 26, the purpose of yieldingly mounting said carrier being to absorb the shock of the carriage or cushion the blow thereof resulting from the escapement operation, and thus to minimize the noise'. The means employed for this purpose in the present instance comprises a single member or part which is shown detachedand reversed and partly inverted for the sake of clearness in Fig. 4, and designated as a whole by the numeral 28'. Theyoke or bracket 28 is preferably formed of tempered sheet metal bent to the shape shown,`said bracket comprising an attaching plate-like portion 29, and cross or laterally extending portions'30 bent at right-angles to the part 29' andterminating in parallel ears or devices 31 which are formed with coned bearing openings indi- 1 cated at 32. A space orcutout indicated at 33 is provided centrally between the parts 30. The portion 29 is formed with an 'enlarged central opening 34 and also with screw holes near the sides, said screw holes lbeing indicated at 35.

The member or bracket 28 is thus shaped to'provide -a yoke having springer yieldingl ears or end'portions 31`. The yoke or bracket 28 is secured to the rear of thefdog carrierand between it i. and the" depending arm 19, the screw 19 passing freely' throughthe hole' 34 in the plate portion 29, this hole being of sufficient size to permit also free passage of the coiled spring 19b and not interfering with the action of saidspring. Theyoke`28'is fixed in place by headed screws '36 which pass through the holes 35 andare threaded into the dog carrier, thus firmly clamping or securing the yoke in place with the face ofthe part 29 tight' against-,the rear uprightffaceAl of the dog carrier part 15. rEhe cutout 33 affords a passageway for the lower portion of the arm 19 so that complete contact and rigidity may be obtained between the dog carrier and the ,attaching part 29. This will be understood clearly from Figs. l and 3. From Fig. 3 it will be clear that with 'the yoke in position the part 29 is substantially upright, the lateral portions 30 are substantially horizontal, while the ears or pivot devices 31 are vertically disposed and extend upward and forward from the lateral portions 30, bringing the coned bearing openings 32 in register with the supports or pivot devices 24 and 26 so that the coned ends thereof may engage with the bearing openings 32 and thus pivotally and yieldingly support the dog carrier through the yoke or intermediate member 28. lt will be observed especially from Figs. 1 and 3 that the distance between the parallel ears 31 is somewhat greater 4than the length of the transverse lower portion 16 of the dog carrier so that on each side there is a space7 indicated by the numeral 37, between the end of the dog carrier and the inner face of the adjacent ear 31. Also it will be observed that there is a considerable space between the outer face of said ear and the inner face of the adjacent lug 23, this latter space being indicated by the numeral 38. ln other words, the portions or lugs 23 of the hanger 22 loosely embrace and receive the rocker 15, 16 and the ears or yielding connections 31 are disposed in the spaces between the lower portion 16 of the dog carrier and the lugs 23 so that said ears 31 may have considerable lateral play or spring without contacting with other parts than their pivotal supports 24 and 26. The yoke is adapted to yield in both directions of the carriage travel.

At printing or spacing operations an impulse is transmitted through the member 21 to the arm 19 which is swung rearward about the pivotal axis of the dog carrier that passes through the supports 24 and 26, the upper portion of the dog carrier above said axis being swung forward, thus bringing the face 14a of the rigid dog 14 into cra-opera tive engagement with the escapement wheel and freeing the stepping dog 13 which will step forward under the impulse of its spring so as tobe in the path of the next oncoming tooth of the escapement wheel when theactuated printing key is released, all as is well understood. `When this release takes place and the dog rocker swings back towards normal position the dog 14 releases the escapement wheel which then advances a letter space distance as permitted by the stepping dog'13, the stepping or feeding movement being limited by the stop 13a of the stepping dog. The slight shock transmitted from the power driven carriage i'zbreugb the escape! ment wheel 1l, stepping dog 13 and stop 13a to the dog carrier or rocker, will be cushioned and absorbed by the spring yoke 28, thus minimizing the noise and this result will be obtained at each operation of the escapement mechanism.

It will be observed that by my present invention there is provided an exceedingly simple device which minimizes the shocks incident to the step-by-step carriage feed movements, cushioning the blows of the parts and greatly diminishing noise, this device in the present instance comprising a single inexpensive part which is readily attached to existing styles -of typewriting machines.

Various changes may be made without departing from my invention.

What I claim as new and desire to secure by Letters Patent, is

l. In a typewriting machine, the combination of a traveling carriage, escapement devices therefor comprising a dog carrier having a detachable yielding part, and a snpport on which said dog carrier is mounted through said yielding part, said yielding part wholly supporting said dog carrier.

2. In a typewriting machine, the combination of a traveling carriage, escapement devices therefor comprising a pivotal dog carrier having a detachable supporting part adapted to yield in a direction substantially longitudinal of the carriage, and a fixed pivotal support engaged by said supporting part, said part in itself wholly supporting said dog carrier on said pivotal support.

3. In a typewriting machine, the combination of a power-driven carriage, escapement devices therefor comprising a dog, a dog carrier, two oppositely disposed pivotal supports one on each side of said carrier, and fixed pivots co-operative with said supports, said supports in themselves wholly supporting said carrier and being adapted to yield in both directions to permit movements of said carrier at right-angles to the direction of its feeding movements under actuation of the printing keys.

4. In a typewriting machine, the combination of a traveling carriage, escapement devices therefor comprising a dog carrier, stationary parts between which said dog carrier is loosely arranged, and yielding connections between said dog carrier and said stationary parts, said yielding connections comprising spring ears detachably secured to the dog carrier and engaging with pivotal projections on said stationary part to Wholly support said dog carrier.

5. In a typewriting machine, the combination of a traveling carriage, escapement devices therefor comprising a dog carrier, a yoke-piece secured to said dog carrier and provided with parallel spring ears, and stationary pivots co-axial with each other and engaging said spring ears. 6. In a typewriting machine, the combination of a traveling carriage, escapement devices therefor comprising an escapement wheel, a dog rocker provided at its upper end with dogs co-operative with said wheel, stationary pivots oppositely disposed and between which the lower end portion of said rocker is loosely arranged, and a spring metal yoke detachably secured to the lower end portion of said dog rocker and having integral bearing portions interposed between the dog rocker itself and said stationary pivots, said bearing portions cooperating with said pivots.

7 In a typewriting machine, the combination of a traveling carriage; escapement devices therefor comprising a dog carrier; a spring metal yoke-piece detachably secured to said dog carrier and comprising a like portion, portions laterally extending from said plate-like portion and disposed at right-angles thereto, and perforated ears extending in parallelism from said lateral portions; and pivots engaging said ears.

Signed at Ilion, in the county of Herkimer and State of New York, this 8th day of .luna-A. D. 1922.

GEORGE A. SEIB.

Witnesses:

LiNNln F. BURNETT, H. J. KEELER.

plate e. 

